northern nevada feasibility study
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NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
AUGUST 2, 2017
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
• Status update – UNR activity focus – WaterSMART grant
• Collaboration opportunities • Next steps • Nevada Water Innovation Campus
Today's Topics
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
• Determine if Nevada’s newly adopted Exceptional Quality Reclaimed Water (Category A+), which creates a regulatory pathway for indirect potable reuse, offers water management opportunities for the Truckee Meadows region. – 5 Year effort (2016-2021) – $6-8 million
Reclaimed Water Feasibility Study
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
• Groundwater augmentation, potable, recreational or environmental uses
• Storing and securing a drought proof water supply for the future
• Diversify the region’s water supply portfolio while reducing reliance on the Truckee River
• Governor’s Drought Forum recommended advanced reclaimed water treatment investigations
Exception Quality A+ Water Potential
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
• 130 million gallons per day • Provides 25% of regional water supply • Reduces dependence on imported water • Pioneer in creating “agency legitimacy” movement
Orange County Groundwater Replenishment System
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Nevada Regulations
Demonstration Project
Pilot Testing Technologies
Funding
Community Outreach
Hydrogeologic Investigations
Regional Feasibility Phase Activities
Project Development
Regional Feasibility Study created from
recognized best practices
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
UNR Scope of Work • 3-1/2 year effort • $676,000 Contract • Krishna Pagilla, PhD
– Internationally Recognized Water Expert – Director – Nevada Water Innovation Campus
• 3 PhD candidates: – Laura Haak – Vijay Sundaram – Lydia Peri
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Advanced Water Treatment Technologies Demonstration Project Tasks
• Task 1: Project Rationale and Justification • Task 2: Treatment Technologies Evaluations • Task 3: Basis of Design • Task 4: Operating and Testing Plan
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
• Identify regional economic, environmental, and social benefits
• Assess status-quo management of water and recycled water resources
• Develop a statement of opportunity for recycled water • Using “North Valleys” as the study area
Task 1: Project Rationale and Justification for Potable Reuse Scope of Work
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Triple Bottom Line Assessment: Value Tree
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Task 1 Findings • Potable Reuse provides greatest benefits through environmental
criteria – Groundwater quality may improve
• Aquifer replenishment and decreased pumping from depleted wells – Water stress (indicator of water security) will decrease in the North Valleys
• Increased water resource size through aquifer replenishment
• Potable Reuse also benefits social criteria – Health risk assessment shows safety expected for removal of pathogens,
regulated, and unregulated contaminants – Water conservation goals are expected to improve with PR
• Larger pool of water resources available
• Potable Reuse is more expensive than status-quo management – Capital costs for treatment train upgrades and distribution system – Value is generated through creation of a new water resource
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Task 1 Recommendations • Potable Reuse improves future water management
– Developing a new aquifer to increase local water resources – Adaptable management that can balance flood risk, drought supplies,
conjunctive use, and well depletion – Removes need to export reclaimed water
• Further study of Potable Reuse should fill in gaps and complete a site and technology specific health risk assessment – Literature shows wide variability in pathogen removal, DBP formation, and
unregulated contaminant concentrations to influent • Local control may also correlate to additional external and
internal benefits – Energy savings, air pollution, carbon footprint – Water quality improvements – Local employment
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
• Nevada Proposed IPR Regulations and Requirements • Identify potential advanced treatment options • Evaluate case studies • Select advanced treatment train(s) for demonstration project • Provide technological justification for treatment process
selection
Task 2: Treatment Technologies that can meet Nevada DEP Regulations/ Requirements Scope of Work
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Nevada Reclaimed Water Regulations
Indirect Potable Reuse through Infiltration Basins
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Nevada Reclaimed Water Regulations Indirect Potable Reuse through Aquifer Injection
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Task 2 Recommendations: Treatment Trains Recommended for IPR Demonstration
Spreading Basin IPR Project Train (Category A Effluent + Vadose Zone
Treatment) Wastewater Secondary Treatment Granular Media Filtration with Pretreatment UV Disinfection Chlorination for Residual Maintenance (if needed) Spreading Basin Vadose Zone/Soil Aquifer Treatment (SAT)
Saturated Zone Travel Time
Injection Well IPR Project Train (Ozone-BAC AWTF)
Wastewater Secondary Treatment
Coagulation-Flocculation-Clarification Granular Media Filtration (CFC GMF)
Ozone-BAC (O3-BAC) UV Disinfection Effluent Polishing Chlorination for Residual Maintenance (if needed) Injection Saturated Zone Travel Time
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Task 3: Basis of Design for the Demonstration Project Scope of Work
• Determine Flows and Loads • Develop Specific Treatment Requirements • Perform Design Calculations • Evaluate Treatment Equipment Options • Summarize Design Criteria • Develop Conceptual Process Flow Diagram • Prepare Basis of Design Report for Spreading Basin IPR and
Injection Well IPR Demonstration Project
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Task 4: Development of a System Testing Plan Scope of Work
• Contaminant Monitoring Plan • Sampling Plan • Critical Control Points (CCP) • Instrumentation Plan • System Testing Plan
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Bureau of Reclamation WaterSMART Grant
• $300,000 additional regional effort • $150,000 federal grant – 50% match by Washoe County
• Water Rights Development • Water Markets Evaluation • Regional Long-Term Climate Variability Analysis • Low Energy Treatment Technologies
Scope of Work
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
LIFT Scholarship Exchange Experience for Innovation & Technology Program
• Water Environment and Research Foundation scholarship • Utility personnel to visit other utilities • Lydia Peri selected • Hampton Roads Sanitation District (VA) • Advanced water treatment pilot (O3-BAC-UVAOP)
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
IWA Reuse 2017 – Long Beach, CA International Conference on Water Reclamation and Reuse
• Presentation of UNR tasks • Representation from UNR (faculty/students), Washoe
County and City of Reno • Team acknowledged for innovative
collaboration with NDEP as a model for regional project implementation
• Regional pilot project recognized
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Next Steps • Preparing for demonstration projects
– Procuring treatment equipment – Developing system testing plan – Hydrogeologic investigations
• Collaboration with our Independent Advisory Team • Continue pilot testing treatment technologies • Regional team gaining expertise • Kick off Bureau of Reclamation grant work
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Nevada Water Innovation Campus Kick off Reception August 24th
NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies
Thank you
Rick Warner, Senior Engineer • rwarner@washoecounty.us
Dr. Krishna Pagilla, UNR • pagilla@unr.edu
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